/*
 * Copyright (c) 2007-2012, Oracle and/or its affiliates. All rights reserved.
 * ORACLE PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
/*
 * Copyright 1999-2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
/*
 * $Id: AttList.java,v 1.2.4.1 2005/09/15 08:15:35 suresh_emailid Exp $
 */
package com.sun.org.apache.xml.internal.utils;

import org.w3c.dom.Attr;
import org.w3c.dom.NamedNodeMap;
import org.w3c.dom.Node;

import org.xml.sax.Attributes;

/**
 * Wraps a DOM attribute list in a SAX Attributes.
 * @xsl.usage internal
 */
public class AttList implements Attributes {

    /** List of attribute nodes          */
    NamedNodeMap m_attrs;

    /** Index of last attribute node          */
    int m_lastIndex;

    // ARGHH!!  JAXP Uses Xerces without setting the namespace processing to ON!
    // DOM2Helper m_dh = new DOM2Helper();

    /** Local reference to DOMHelper          */
    DOMHelper m_dh;

    //  /**
    //   * Constructor AttList
    //   *
    //   *
    //   * @param attrs List of attributes this will contain
    //   */
    //  public AttList(NamedNodeMap attrs)
    //  {
    //
    //    m_attrs = attrs;
    //    m_lastIndex = m_attrs.getLength() - 1;
    //    m_dh = new DOM2Helper();
    //  }

    /**
     * Constructor AttList
     *
     *
     * @param attrs List of attributes this will contain
     * @param dh DOMHelper
     */
    public AttList(NamedNodeMap attrs, DOMHelper dh) {

        m_attrs = attrs;
        m_lastIndex = m_attrs.getLength() - 1;
        m_dh = dh;
    }

    /**
     * Get the number of attribute nodes in the list
     *
     *
     * @return number of attribute nodes
     */
    public int getLength() {
        return m_attrs.getLength();
    }

    /**
     * Look up an attribute's Namespace URI by index.
     *
     * @param index The attribute index (zero-based).
     * @return The Namespace URI, or the empty string if none
     *         is available, or null if the index is out of
     *         range.
     */
    public String getURI(int index) {
        String ns = m_dh.getNamespaceOfNode(((Attr) m_attrs.item(index)));
        if (null == ns)
            ns = "";
        return ns;
    }

    /**
     * Look up an attribute's local name by index.
     *
     * @param index The attribute index (zero-based).
     * @return The local name, or the empty string if Namespace
     *         processing is not being performed, or null
     *         if the index is out of range.
     */
    public String getLocalName(int index) {
        return m_dh.getLocalNameOfNode(((Attr) m_attrs.item(index)));
    }

    /**
     * Look up an attribute's qualified name by index.
     *
     *
     * @param i The attribute index (zero-based).
     *
     * @return The attribute's qualified name
     */
    public String getQName(int i) {
        return ((Attr) m_attrs.item(i)).getName();
    }

    /**
     * Get the attribute's node type by index
     *
     *
     * @param i The attribute index (zero-based)
     *
     * @return the attribute's node type
     */
    public String getType(int i) {
        return "CDATA"; // for the moment
    }

    /**
     * Get the attribute's node value by index
     *
     *
     * @param i The attribute index (zero-based)
     *
     * @return the attribute's node value
     */
    public String getValue(int i) {
        return ((Attr) m_attrs.item(i)).getValue();
    }

    /**
     * Get the attribute's node type by name
     *
     *
     * @param name Attribute name
     *
     * @return the attribute's node type
     */
    public String getType(String name) {
        return "CDATA"; // for the moment
    }

    /**
     * Look up an attribute's type by Namespace name.
     *
     * @param uri The Namespace URI, or the empty String if the
     *        name has no Namespace URI.
     * @param localName The local name of the attribute.
     * @return The attribute type as a string, or null if the
     *         attribute is not in the list or if Namespace
     *         processing is not being performed.
     */
    public String getType(String uri, String localName) {
        return "CDATA"; // for the moment
    }

    /**
     * Look up an attribute's value by name.
     *
     *
     * @param name The attribute node's name
     *
     * @return The attribute node's value
     */
    public String getValue(String name) {
        Attr attr = ((Attr) m_attrs.getNamedItem(name));
        return (null != attr) ? attr.getValue() : null;
    }

    /**
     * Look up an attribute's value by Namespace name.
     *
     * @param uri The Namespace URI, or the empty String if the
     *        name has no Namespace URI.
     * @param localName The local name of the attribute.
     * @return The attribute value as a string, or null if the
     *         attribute is not in the list.
     */
    public String getValue(String uri, String localName) {
        Node a = m_attrs.getNamedItemNS(uri, localName);
        return (a == null) ? null : a.getNodeValue();
    }

    /**
     * Look up the index of an attribute by Namespace name.
     *
     * @param uri The Namespace URI, or the empty string if
     *        the name has no Namespace URI.
     * @param localPart The attribute's local name.
     * @return The index of the attribute, or -1 if it does not
     *         appear in the list.
     */
    public int getIndex(String uri, String localPart) {
        for (int i = m_attrs.getLength() - 1; i >= 0; --i) {
            Node a = m_attrs.item(i);
            String u = a.getNamespaceURI();
            if ((u == null ? uri == null : u.equals(uri)) && a.getLocalName().equals(localPart))
                return i;
        }
        return -1;
    }

    /**
     * Look up the index of an attribute by raw XML 1.0 name.
     *
     * @param qName The qualified (prefixed) name.
     * @return The index of the attribute, or -1 if it does not
     *         appear in the list.
     */
    public int getIndex(String qName) {
        for (int i = m_attrs.getLength() - 1; i >= 0; --i) {
            Node a = m_attrs.item(i);
            if (a.getNodeName().equals(qName))
                return i;
        }
        return -1;
    }
}
